<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Title</title>
  </head>
  <body>
    <form action="http://127.0.0.1:8080/url/demo1" method="post">
      <input type="submit" value="提交">
    <form>
  </body>
</html>